Checking results for: pressbooks.com
Additional info for https://pressbooks.com
Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 13.249.228.97 |
| Server Software | nginx |
| CDN | CDN (Hit from cloudfront) |
| Compression | gzip |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 13.249.228.97
Server Software nginx
CDN CDN (Hit from cloudfront)
Compression gzip
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Performance
| DNS Lookup | 13.6 ms |
| TCP Connect | 14.8 ms |
| TLS Handshake | 6.3 ms |
| Time To First Byte (TTFB) | 29.5 ms |
| Content Download | 1.7 ms |
| Total Response Time | 31.2 ms |
DNS Lookup 13.6 ms
TCP Connect 14.8 ms
TLS Handshake 6.3 ms
Time To First Byte (TTFB) 29.5 ms
Content Download 1.7 ms
Total Response Time 31.2 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ✔ Configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ✔ nosniff |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ✔ Configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ✔ nosniff
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Pressbooks: The Leading Platform for Digital Publishing & OER |
| Meta Description | Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) |
| Canonical | https://pressbooks.com/ |
| Robots Meta | index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1 |
| Open Graph Title | Pressbooks: The Leading Platform for Digital Publishing & OER |
| Open Graph Description | Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) opti |
| Open Graph Image | https://pressbooks.com/app/uploads/2023/03/Website-Illust... |
| Twitter Card | summary_large_image |
| Twitter Title | Pressbooks: The Leading Platform for Digital Publishing & OER |
| Twitter Description | Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) opti |
| Twitter Image | https://pressbooks.com/app/uploads/2023/03/Website-Illust... |
Title Pressbooks: The Leading Platform for Digital Publishing & OER Meta Description Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) Canonical https://pressbooks.com/ Robots Meta index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1 Open Graph Title Pressbooks: The Leading Platform for Digital Publishing & OER Open Graph Description Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) opti Open Graph Image https://pressbooks.com/app/uploads/2023/03/Website-Illust... Twitter Card summary_large_image Twitter Title Pressbooks: The Leading Platform for Digital Publishing & OER Twitter Description Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) opti Twitter Image https://pressbooks.com/app/uploads/2023/03/Website-Illust... Detected Technologies
| Technology | WordPress Google Analytics Google Tag Manager Nginx PHP HubSpot |
Technology WordPress Google Analytics Google Tag Manager Nginx PHP HubSpot
HTTP Headers
| Content-type
| text/html; charset=UTF-8 |
| Server
| nginx |
| Date
| Tue, 28 Jul 2026 16:56:47 GMT |
| X-content-type-options
| nosniff |
| Content-encoding
| gzip |
| Link
| ; rel=shortlink |
| X-tec-api-version
| v1 |
| X-tec-api-root
| https://pressbooks.com/wp-json/tribe/events/v1/ |
| X-tec-api-origin
| https://pressbooks.com |
| Content-security-policy
| frame-ancestors * |
| X-xss-protection
| 1; mode=block |
| Vary
| Accept-Encoding |
| X-cache
| Hit from cloudfront |
| Via
| 1.1 f76354f05fc036eccbfd695b3f5b654a.cloudfront.net (CloudFront) |
| X-amz-cf-pop
| CDG50-P6 |
| X-amz-cf-id
| fAbSUewCUl8Yr9110cGAZ0AB2oaQqUrE_Vo8wX4QBlEIfAbuqc9Lww== |
| Age
| 2207 |
Meta Tags
| Viewport | width=device-width, initial-scale=1, minimum-scale=1 |
| Robots | index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1 |
| Description | Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) |
| Article:modified_time | 2025-07-30T17:15:41+00:00 |
| Google-site-verification | Xic4BeEq8h0LB68oSONR3G5SNEpN6DMUjgPTByr8Hd4 |
| Generator | performance-lab 3.9.0; plugins: |
| Tec-api-version | v1 |
| Tec-api-origin | https://pressbooks.com |
| Msapplication-TileImage |  |
Content-type text/html; charset=UTF-8
Server nginx
Date Tue, 28 Jul 2026 16:56:47 GMT
X-content-type-options nosniff
Content-encoding gzip
Link ; rel=shortlink
X-tec-api-version v1
X-tec-api-root https://pressbooks.com/wp-json/tribe/events/v1/
X-tec-api-origin https://pressbooks.com
Content-security-policy frame-ancestors *
X-xss-protection 1; mode=block
Vary Accept-Encoding
X-cache Hit from cloudfront
Via 1.1 f76354f05fc036eccbfd695b3f5b654a.cloudfront.net (CloudFront)
X-amz-cf-pop CDG50-P6
X-amz-cf-id fAbSUewCUl8Yr9110cGAZ0AB2oaQqUrE_Vo8wX4QBlEIfAbuqc9Lww==
Age 2207
Viewport width=device-width, initial-scale=1, minimum-scale=1 Robots index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1 Description Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) Og:locale en_US Og:type website Og:title Pressbooks: The Leading Platform for Digital Publishing & OER Og:description Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) opti Og:url https://pressbooks.com/ Og:site_name Pressbooks Article:modified_time 2025-07-30T17:15:41+00:00 Og:image 
Og:image:width 1687 Og:image:height 1219 Og:image:type image/png Twitter:card summary_large_image Twitter:title Pressbooks: The Leading Platform for Digital Publishing & OER Twitter:description Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) opti Twitter:image Google-site-verification Xic4BeEq8h0LB68oSONR3G5SNEpN6DMUjgPTByr8Hd4 Generator performance-lab 3.9.0; plugins: Tec-api-version v1 Tec-api-origin https://pressbooks.com Msapplication-TileImage
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